Soil–structure interaction (SSI) for Integral-abutment bridges

Integral-abutment bridges , which do not contain expansion joints , provide a very attractive alternative to the more traditional , stub-abutment bridges that have expansion joints . However the main issue related to the analysis of this type of bridges is dealing with soil-structure interaction of the abutments and the supporting piles. Various soil constitutive models have been used in studies of soil-structure interaction in this kind of bridges by researchers . Emphasis is placed on integral abutment behavior, since abutments together with piers are the most critical elements in securing the integrity of bridge superstructures .The behaviour of the soil can be studied in PLAXIS since PLAXIS may show the results in many ways such as patterns for displacements, moment- and force distributions, the stresses in the soil.The purpose of this paper is to investigated the influence of Soil friction angle and Cohesion in Longitudinal displacements. The bridge’s results that used in this paper are from a skewed PC girder integral-abutment bridge in the State of Iowa were instrumented over a two-year period to measure structural behavior

Keywords:

Integral Abutment Bridges , Soil–structure interaction , PLAXIS , Soil friction angle